Piston ring



Aug. 25, 1931.

N. 'r. HARRINGTON PISTON RING Fil ed July 22, 1929 F-HL ' INVENTOR ATTORNEYrS' Patented Aug. 25, 1931 UNITED STATESPATENT- OFFICE NORMAN T. HARRINGTON, OF CLEVELAND, RING COMPANY OF AMERICA, INC., OP CLEVEIJAND OHIO,

OHIO, ASSIGNOR TO- THE SIMPLEX PISTON A CORPORATION OF OHIO PISTON RING Application filed July 22, 1929 Serial No. 380,106.

single ring, two separate rings are con-.

structed to co-act with each other to produce the desired effect. The invention therefore consists in the construction of such rings as hereinafter set forth.

In the drawings:

Figure 1 is a side elevation showing a development in a single plane of a pair of cooperating rings;

Figure 2 is a similar view illustrating a modified construction.

As shown in Figure 1, A is a ring blank having a plain face B on one side thereo and a face C on the opposite side provided with projecting lugs D at suitably spaced intervals. The ring is further provided With a series of circumferential slotsE arranged of the lugs D and extending upon opposite sides thereo from each other by an un-cut opposite each symmetrically but separated portion F. G is a plane ring which is place adjacent to the ring A on theside of the lugs D. The combined axial dimensions of the rings A and G is somewhat greater than the axial dimensions of the ring groove in which they are to be placed so that to insert them in such groove it is necessary to bend-the bars H which are between the slots E and the face C. This will develop a predetermined axial.-

expansive pressure which will hold the ring G and also the face B of the ring A in sealing contact with the opposite roove. With Figure 2 the ring A is formed with plain faces on opposite sides thereof and witha series of slots E The ring G instead of having plain faces is provided with a series of inwardly projecting lugs E which are arranged to be centrally opposite the slots E. There is also preferably one lug D which is of greater axial faces of the ring transverse With the y f with both sides of the f trans-split at one point, an

d axially inwardly the modified construction shown in similar to those in Figure 1.

dimension than the lugs D and which-is adapted to engage a slot I in between the ends of the ring A on opposite sides of the split. Thus this lug D will hold the rings A and G and will properly register the lugs D with the slots E. may be held also enters piston. v

With the construction as above described, the sections A and G; are but are interchan eable with the corresponding sections of ot er rings. Thus in case of from rotation by a pin J whie from relative rotation If desired, the combined rin s,

the slot I and is attached to the arranged in pairs the breakage of one memberof a pair it may be replaced by another corresponding member while still utilizing the companion mem her. When, however, the pairs of rings are placed in a ring groove they function as a.

unit and will produce an oil and gas seal oove.

What I claim as my invention is:

1 A piston ring comprising a pair of ring members, one of which is site parallel plain faces with intermediate circumferentially extendin slots andbeing the other of-sai formed with oppomembers having an outer plain face. and

extending lugsarranged for registration with said slots and a single In of greater axial depth adapted to enter the slot formed by the transverse split in said first mentioned faces.

- 2. A piston ring comprising a pair of ftransplit ring members, one of which is rovided with a series of axially projecting ugs circumferentially spaced thereabout', one of said members formed with a single series of circumferentially extending slots, the slots of said series being adapted to register with the projecting lugs and one of said members having a lug of greater axialdepth than said first mentioned lugs adapted to enter the slot formed by the transverse split in the other of said members.

In testimony whereof I afiix my signature.

NORMAN 'T; HARRINGTON. 

